Stuti posted these: a particle is thrown with any velocity vertically upward. the distance traveled by particle in last sec of ascent is 1)g 2)g/2 3)g/4 4)cant be calculated a ball is dropped from a bridge of 122.5 metre above a river. after ball h...

## Practice problems for class 9 SA1

Try to solve these problems, it will help you score good marks in Physics in first summative assessment.

- Calculate the force required to be imparted to a car to give it a velocity of 30 m/s in

## Sign Convention in kinematics

Please tell me the sign convension for velocity & accleration for a body moving upwards ,downwards, right and left relative to another body? (Apoorv Katoch asked) Answer: In motion, sign conventions are arbitrary. You take one direction as positive and the direction opposite to it as negative. For example, if you consider a [...]

## A Numerical Problem from motion

A small smooth object slides down a smooth incline plane, inclined at am angle 30 to the horizontal. What is

- the acceleration down the plane?
- The time to reach the bottom if the plane is 50m long?

The object is now thrown up the plane with an initial velocity me 15m/s ; how long does it